- Original Caption Released with Image:
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This image shows a comet particle collected by the Stardust spacecraft.
The particle is made up of the silicate mineral forsterite, also known as
peridot in its gem form. It is surrounded by a thin rim of melted aerogel,
the substance used to collect the comet dust samples. The particle is
about 2 micrometers across.
- Image Credit:
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NASA/JPL-Caltech/University of Washington
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